Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0e853743075172…

MALICIOUS

PDF

83.5 KB Created: 2021-03-19 20:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 872f365743ddf0d78846778b63b337b7 SHA-1: 5046aa2fe6c1371658e4cc9c72f3b616a58de457 SHA-256: 6e0e853743075172c1b67ec48028e993bec0cf95a04e5677c8b07fb75c5578b2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The embedded document body, though partially corrupted, contains text related to a 'Xinjiang goldwind annual report 2018', which is likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dugedepap.ru/123?utm_term=xinjiang+goldwind+annual+report+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453908/normal_5fd965866ed45.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/gjcihih/45399981669.pdfIn PDF document text
    • https://cdn.sqhk.co/berovanova/ijhqQhe/how_to_make_a_spiral_rainbow_balloon_arch.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/s9CjdES/new_r_b_soul_music_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486552/normal_601bb87c19d1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_60252a4b80c0a.pdfIn PDF document text
    • http://kofuwokesa.22web.org/attractive_man_cheat_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_60160be2d3e17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366665/normal_6001a7e39d8ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487206/normal_602c0658a7d6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478950/normal_5ffde68679606.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_6420bc60db6041dbb8fb492b83719f39.pdf?index=trueIn PDF document text
    • https://2521c3e2-5736-45bb-9381-71005f2ffa37.filesusr.com/ugd/c85705_b000c567b1f845459e35654c0777e7e8.pdf?index=trueIn PDF document text
    • http://bikutuvuxaxixo.epizy.com/sukomibofadopadokegijeme.pdfIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_9a3b750fd7dc4beb907be2dc8babbf8f.pdf?index=trueIn PDF document text
    • http://tunojaw.rf.gd/mopemafaf.pdfIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_b55cc160af0a4c2d85b20d4a7fb49726.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_523464b74f1344bf9ad181bef9782ece.pdf?index=trueIn PDF document text
    • https://b27aca93-056c-4dd2-83a6-fd909c9f709d.filesusr.com/ugd/2ba3ac_deeb1be101944b12acefd0c3d61ef6f8.pdf?index=trueIn PDF document text
    • http://safijojakas.epizy.com/bk_precision_390a_manual.pdfIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_229e65e3c894455185630e4ebc260aa9.pdf?index=trueIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_9a3a81ed07d148a499fba404540229ab.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001052e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052E 5616 bytes
SHA-256: 60f0a9deee0c71ce8aa2b5f4a940b67c5377366b6495237b8491ba612e34d30c
font_01_sfnt_off00011875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11875 11876 bytes
SHA-256: cfa0b9754e21ec3de3f9113b05770ed8b2ad37f026d36e9027137dd04941829c